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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 23 — Dec. 1, 2013
  • pp: 4996–4999

Compressive sensing spectrometry based on liquid crystal devices

Yitzhak August and Adrian Stern  »View Author Affiliations

Optics Letters, Vol. 38, Issue 23, pp. 4996-4999 (2013)

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We present a new type of compressive spectroscopy technique employing a liquid crystal (LC) phase retarder. A tunable LC cell is used in a manner compliant with the compressive sensing (CS) framework to significantly reduce the spectral scanning effort. The presented optical spectrometer consists of a single LC phase retarder combined with a single photo detector, where the LC phase retarder is used to modulate the input spectrum and the photodiode is used to measure the transmitted spectral signal. Sequences of measurements are taken, where each measurement is done with a different state of the retarder. Then, the set of photodiode measurements is used as input data to a CS solver algorithm. We demonstrate numerally compressive spectral sensing with approximately ten times fewer measurements than with an equivalent conventional spectrometer.

© 2013 Optical Society of America

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(300.0300) Spectroscopy : Spectroscopy
(310.0310) Thin films : Thin films
(110.1758) Imaging systems : Computational imaging
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Optics in Computing

Original Manuscript: July 23, 2013
Revised Manuscript: October 9, 2013
Manuscript Accepted: October 28, 2013
Published: November 21, 2013

Yitzhak August and Adrian Stern, "Compressive sensing spectrometry based on liquid crystal devices," Opt. Lett. 38, 4996-4999 (2013)

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